Aroostook County, ME: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Aroostook County scores at the 76.1th percentile for flood hazard, rated "Relatively Moderate" — a middling flood hazard by national standards. The hazard here is driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 3.3 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Aroostook County's flood-insurance compliance gap
FEMA's own figures for Aroostook County report more NFIP policies in the mapped flood zone than FEMA's own count of residential structures there, which produces a compliance rate over 100% — a data problem on FEMA's side, not evidence that everyone here is over-insured. See the data quality guide for how widespread this is. Looking beyond the mandated zone, 0.3% of all residential structures in Aroostook County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Aroostook County ranks
Among the 3144 US counties FEMA scores for flood hazard, Aroostook County ranks 785 — 1 being the highest hazard nationally — and 818 by population among all 3144 counties covered here, where 1 is the largest. Aroostook County, Maine is home to about 66,776 people across 6,671.22 square miles of land.
Checking a specific address in Aroostook County
Across all of Aroostook County's 29,481 residential structures, 92 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Aroostook County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Aroostook County's compliance figure is one of the ones affected by FEMA's incomplete denominator data — the data quality guide explains what that means and how many counties it touches.